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HT45F2002

2-Wire Communication Flash MCU

HT45F2002

2-Wire Communication Flash MCU

SUBM A,[m]

SubtractDataMemoryfromACCwithresultinDataMemory

Description

ThespecifiedDataMemoryissubtractedfromthecontentsoftheAccumulator.Theresultis

storedintheDataMemory.Notethatiftheresultofsubtractionisnegative,theCflagwillbe

clearedto0,otherwiseiftheresultispositiveorzero,theCflagwillbesetto1.

Operation

[m]←ACC−[m]

Affectedflag(s)

OV,Z,AC,C

SUB A,x

SubtractimmediatedatafromACC

Description

TheimmediatedataspecifiedbythecodeissubtractedfromthecontentsoftheAccumulator.

TheresultisstoredintheAccumulator.Notethatiftheresultofsubtractionisnegative,theC

flagwillbeclearedto0,otherwiseiftheresultispositiveorzero,theCflagwillbesetto1.

Operation

ACC←ACC−x

Affectedflag(s)

OV,Z,AC,C

SWAP [m]

SwapnibblesofDataMemory

Description

Thelow-orderandhigh-ordernibblesofthespecifiedDataMemoryareinterchanged.

Operation

[m].3~[m].0↔[m].7~[m].4

Affectedflag(s)

None

SWAPA [m]

SwapnibblesofDataMemorywithresultinACC

Description

Thelow-orderandhigh-ordernibblesofthespecifiedDataMemoryareinterchanged.The

resultisstoredintheAccumulator.ThecontentsoftheDataMemoryremainunchanged.

Operation

ACC.3~ACC.0←[m].7~[m].4

ACC.7~ACC.4←[m].3~[m].0

Affectedflag(s)

None

SZ [m]

SkipifDataMemoryis0

Description

IfthecontentsofthespecifiedDataMemoryis0,thefollowinginstructionisskipped.Asthis

requirestheinsertionofadummyinstructionwhilethenextinstructionisfetched,itisatwo

cycleinstruction.Iftheresultisnot0theprogramproceedswiththefollowinginstruction.

Operation

Skipif[m]=0

Affectedflag(s)

None

SZA [m]

SkipifDataMemoryis0withdatamovementtoACC

Description

ThecontentsofthespecifiedDataMemoryarecopiedtotheAccumulator.Ifthevalueiszero,

thefollowinginstructionisskipped.Asthisrequirestheinsertionofadummyinstruction

whilethenextinstructionisfetched,itisatwocycleinstruction.Iftheresultisnot0the

programproceedswiththefollowinginstruction.

Operation

ACC←[m]

Skipif[m]=0

Affectedflag(s)

None

SZ [m].i

SkipifbitiofDataMemoryis0

Description

IfbitiofthespecifiedDataMemoryis0,thefollowinginstructionisskipped.Asthisrequires

theinsertionofadummyinstructionwhilethenextinstructionisfetched,itisatwocycle

instruction.Iftheresultisnot0,theprogramproceedswiththefollowinginstruction.

Operation

Skipif[m].i=0

Affectedflag(s)

None